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. 2016 Aug;50(4):405-8.
doi: 10.1016/j.aott.2016.06.004. Epub 2016 Jul 21.

Effects of two different degrees of lateral-wedge insoles on unilateral lower extremity load-bearing line in patients with medial knee osteoarthritis

Bilge Yılmaz  1 , Serdar Kesikburun  2 , Ozlem Köroğlu  1 , Evren Yaşar  1 , Ahmet Salim Göktepe  1 , Kamil Yazıcıoğlu  1
Affiliations

Effects of two different degrees of lateral-wedge insoles on unilateral lower extremity load-bearing line in patients with medial knee osteoarthritis

Bilge Yılmaz et al. Acta Orthop Traumatol Turc. 2016 Aug.

Abstract

Objective: The aim of this study is to assess the effect of 5 and 10° lateral-wedge insoles on unilateral lower extremity load carrying line in patients with medial knee osteoarthritis using the L.A.S.A.R. posture alignment system.

Patients and methods: Twenty subjects (10 females and 10 males, mean age 67.7 ± 5.4 years (range: 58-78) with bilateral medial knee osteoarthritis were included in the study. The laser line projected on the person by the L.A.S.A.R. posture alignment system showed joint load carrying line. The location of the joint load carrying line in static standing with one foot on the force plate was assessed with barefoot, and 5° and 10° lateral-wedge insoles. Displacement of the load carrying line was measured using a ruler placed tangentially to the patella at the level of joint line.

Results: The load carrying lines measured with 5° and 10° lateral-wedge insoles were significantly laterally located compared to that without wearing insole (p < 0.001). 10° lateral-wedge insole caused a significant more lateral shifting of the load carrying line than 5° lateral-wedge insole (p < 0.001).

Conclusion: Both wedge insoles was effective in moving of the unilateral lower extremity load carrying line to the lateral. Lateral wedged insoles are biomechanically effective and reduce loading of the medial compartment in patients with medial knee osteoarthritis.

Keywords: Knee biomechanics; L.A.S.A.R. posture; Lateral-wedge insoles; Osteoarthritis.

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Figures

Fig. 1
Fig. 1
L.A.S.A.R. posture alignment system.
Fig. 2
Fig. 2
Diagram (a) of the knee joint in transverse plane shows placement of the ruler on the arm of a goniometer that was placed tangentially to the patella at the level of joint line. The projection of the medial margin of the joint line on the ruler was the reference point for the measurements. The distance from the reference point to the load line was measured on the ruler. The photograph (b) shows the placement of the goniometer fixed at 90° for proper tangential placement.
See this image and copyright information in PMC

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